What topic have you written tests for, and for which projects?

Wrote tests on the following topics:

• Functionality of individual components and modules (unit tests): Checking the correctness of class methods, functions, and individual logic parts.
• Interaction between components (integration tests): Verifying the correct joint operation of multiple modules or services.
• User scenarios (end-to-end tests): Simulating user actions in a browser to test the full interaction flow with the application.
• Working with external dependencies (database, APIs, etc.), using mocks and stubs.
• Performance and load testing: Although rare for a typical PHP developer, sometimes had to write basic speed tests for critical code sections.
• Security tests: Checking for common vulnerabilities (SQL injection, XSS) in certain cases.

Projects worked on included:

• E-commerce platforms (online stores): Testing cart, checkout, product management, payment gateway integration.
• CRM systems: Testing client management, deals, tasks, reports.
• Business process automation software: Testing complex workflows, integration with other services.
• RESTful API: Testing endpoints, authorization, data validation.
• Websites on various CMSs (WordPress, Drupal, Laravel/Symfony): Testing user modules, themes, integrations.

The main testing frameworks used were PHPUnit, PestPHP, Dusk (for E2E in Laravel).